# Unit 4: Further Mechanics, Circular Motion

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- Created by: Anabuddy
- Created on: 05-09-12 11:28

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**Angular displacement, θ** is how large an angle (in radians) has been rotated through from the origin.

**Angular velocity, ω** gives us the rate of rotation. It tells us how large an angle is moved through per second. *Measured in rad/s.*

- Angular velocity= 2π radians/time period= 2π/T

We can also define angular velocity in terms of frequency, f

**ω= 2πf**

**Linear velocity, υ** how quickly a rotating object travels in terms of distance, not angle. *Measured in m/s.*

**2πrf**

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